maven packages releases and snapshots versions

releases: online version (used in production environment)

snapshots: snapshot version (used during development)

When maven packages code to a private server, it can be distinguished whether it is packaging the online version or the snapshot version according to whether there is "-SNAPSHOTS" behind the version. If "-SNAPSHOTS" is included, the snapshot version is packaged, otherwise it is the online version.

1. Define version using placeholders
2. Set the default version in properties
3. Set different versionpom configurations according to different profiles in profiles
4. mvn deploy uses the default version for packaging; mvn deploy -p Prod packages and sets the version

5. <?xml version="1.0" encoding="UTF-8"?>
   <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
       <modelVersion>4.0.0</modelVersion>
   
       <groupId>com.boloni</groupId>
       <artifactId>appollo-gfs-parent</artifactId>
       <version>${project.release.version}</version>
       <packaging>pom</packaging>
   
       <name>appollo-gfs-parent</name>
       <url>http://www.xxxxx.com</url>
       <description>[email protected]</description>
   
   
       <properties>
           <project.release.version>0.1-SNAPSHOT</project.release.version>
       </properties>
   
       <profiles>
           <profile>
               <id>prod</id>
               <properties>
                   <project.release.version>0.1</project.release.version>
               </properties>
           </profile>
       </profiles>
       <distributionManagement>
           <repository>
               <id>releases</id>
               <url>http://xxxxxx:8070/nexus/content/repositories/releases</url>
           </repository>
           <snapshotRepository>
               <id>snapshots</id>
               <url>http://xxxxx:8070/nexus/content/repositories/snapshots</url>
           </snapshotRepository>
       </distributionManagement>
   </project>